ath9k_hw: Cleanup power mode API
ath9k_hw: Cleanup power mode API

The 'setChip' variable is unused, remove it and
simplify the functions.

Signed-off-by: Sujith Manoharan <1240f8b9a8d4f8f6d54c4d059a9fef2470495ad4@qca.qualcomm.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs